Question:
Which of the following is not a part of endomembrane system?
Which of the following is not a part of endomembrane system?
Show Hint
The three major eukaryotic organelles excluded from the endomembrane system are mitochondria, chloroplasts, and peroxisomes.
These organelles import their proteins directly from the cytosol and grow by incorporating new lipids and proteins from internal or cytosolic sources.
These organelles import their proteins directly from the cytosol and grow by incorporating new lipids and proteins from internal or cytosolic sources.
Updated On: Jul 23, 2026
- Plasmodesmata
- ER
- Golgi complex
- Peroxisomes
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
The endomembrane system is a coordinated network of internal membranes in eukaryotic cells that work together to modify, package, and transport lipids and proteins.
Organelles within this system are functionally linked either through direct physical continuity or via vesicle transfer.
Step 2: Detailed Explanation:
The components of the endomembrane system include the nuclear envelope, endoplasmic reticulum (ER), Golgi apparatus, lysosomes, vacuoles, and the plasma membrane.
The endoplasmic reticulum (ER) acts as the primary site of protein and lipid synthesis, which directly matches Option (B).
The Golgi complex functions in modifying, sorting, and packaging proteins received from the ER, which directly matches Option (C).
Plasmodesmata are microscopic channels passing through plant cell walls that contain desmotubules, which are physically continuous with the cortical ER of adjacent cells, thus linking them functionally to the endomembrane system, corresponding to Option (A).
Peroxisomes are specialized metabolic compartments bounded by a single membrane that contain enzymes for oxidative reactions, such as the breakdown of fatty acids and detoxification of hydrogen peroxide.
Peroxisomes do not receive proteins or lipids via secretory vesicular transport from the Golgi apparatus, nor do they participate in standard endomembrane trafficking.
Most of their proteins are synthesized on free cytosolic ribosomes and imported post-translationally, meaning they are excluded from the endomembrane system.
Step 3: Final Answer:
Peroxisomes are not a part of the endomembrane system.
This corresponds to Option (D).
The endomembrane system is a coordinated network of internal membranes in eukaryotic cells that work together to modify, package, and transport lipids and proteins.
Organelles within this system are functionally linked either through direct physical continuity or via vesicle transfer.
Step 2: Detailed Explanation:
The components of the endomembrane system include the nuclear envelope, endoplasmic reticulum (ER), Golgi apparatus, lysosomes, vacuoles, and the plasma membrane.
The endoplasmic reticulum (ER) acts as the primary site of protein and lipid synthesis, which directly matches Option (B).
The Golgi complex functions in modifying, sorting, and packaging proteins received from the ER, which directly matches Option (C).
Plasmodesmata are microscopic channels passing through plant cell walls that contain desmotubules, which are physically continuous with the cortical ER of adjacent cells, thus linking them functionally to the endomembrane system, corresponding to Option (A).
Peroxisomes are specialized metabolic compartments bounded by a single membrane that contain enzymes for oxidative reactions, such as the breakdown of fatty acids and detoxification of hydrogen peroxide.
Peroxisomes do not receive proteins or lipids via secretory vesicular transport from the Golgi apparatus, nor do they participate in standard endomembrane trafficking.
Most of their proteins are synthesized on free cytosolic ribosomes and imported post-translationally, meaning they are excluded from the endomembrane system.
Step 3: Final Answer:
Peroxisomes are not a part of the endomembrane system.
This corresponds to Option (D).
Was this answer helpful?
0
0
Top ICAR AIEEA Plant Biotechnology Questions
- Which of the following molecules can be classified under glycosphingolipid category?
- The bicarbonate buffer is a principal buffering system in blood plasma. The ratio of the bicarbonate to carbonic acid required to maintain pH of plasma at 7.4 is:
- Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A): The disruption of $\beta$-oxidation of fatty acids in plants can potentially reduce stress-induced ROS accumulation and improve its stress tolerance.
Reason (R): In plants, $\beta$-oxidation of fatty acids takes place predominantly in peroxisomes, where first enzyme of $\beta$-oxidation viz. fatty acyl CoA oxidase produces large amounts of hydrogen peroxide.
In light of the above statements, choose the correct answer from the options given below. - The serum level of which of the following metabolites can effectively distinguish "Vitamin B12 deficiency" from "Folate deficiency" ?
- Match List-I with List-II
List-I (Name of the Enzyme) & List-II (Class of the enzyme)
(A). Pyruvate carboxylase & (I). Oxidoreductase
(B). Fumarase & (II). Hydrolase
(C). Phospholipase & (III). Lyase
(D). Nitrogenase & (IV). Ligase
Choose the correct answer from the options given below:
View More Questions
Top ICAR AIEEA Microbiology Questions
- Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A): Peptidoglycan-containing bacterial cell wall is resistant to hydrolytic action of many proteases.
Reason (R): The presence of D-amino amino acids in the peptidoglycan structure of bacterial cell wall makes it resistant to most proteases.
In light of the above statements, choose the correct answer from the options given below. - The DNA of the microorganisms living under conditions of extreme temperature is predominantly:
- Which of the following method of recombination in bacteria is DNase sensitive
- Prions are
- Which of the following is a symbiotic nitrogen fixer?
View More Questions
Top ICAR AIEEA Questions
- Which of the following statements is false?
- Which of the following is an example of an inventory?
- According to Adam Smith, productivity gains could be brought about through .
- The supply curve for an artificially scarce good is .
- Which of the following would not be considered an opportunity cost of paid employment?
View More Questions